The evolution of South Africa's democracy promotion in Africa : from idealism to pragmatism

Abstract: South Africa is an emerging power with fairly strong democratic institutions that were crafted during the transition from minority to majority rule twenty years ago. How has South Africa used its position and power to promote democracy in Africa? Against the backdrop of debates on democracy promotion by emerging powers, this article probes attempts by successive post-apartheid governments to promote democracy in Africa. We argue that although democracy promotion featured prominently in South Africa’s policy toward Africa in the immediate post-apartheid period under Nelson Mandela, the administrations of Thabo Mbeki and Jacob Zuma faltered in advancing democratic norms. This is largely because South Africa has confronted pressures to maximize pragmatic national interests, which have compromised a democratic ethos in a continental environment where these values have yet to find steady footing

Player attitudes to avatar development in digital games: an exploratory study of single-player role-playing games and other genres

Digital games incorporate systems that allow players to customise and develop their controllable in-game representative (avatar) over the course of a game. Avatar customisation systems represent a point at which the goals and values of players interface with the intentions of the game developer forming a dynamic and complex relationship between system and user. With the proliferation of customisable avatars through digital games and the ongoing monetisation of customisation options through digital content delivery platforms it is important to understand the relationship between player and avatar in order to provide a better user experience and to develop an understanding of the cultural impact of the avatar. Previous research on avatar customisation has focused on the users of virtual worlds and massively multiplayer games, leaving single-player avatar experiences. These past studies have also typically focused on one particular aspect of avatar customisation and those that have looked at all factors involved in avatar customisation have done so with a very small sample. This research has aimed to address this gap in the literature by focusing primarily on avatar customisation features in single-player games, aiming to investigate the relationship between player and customisation systems from the perspective of the players of digital games. To fulfill the research aims and objectives, the qualitative approach of interpretative phenomenological analysis was adopted. Thirty participants were recruited using snowball and purposive sampling (the criteria being that participants had played games featuring customisable avatars) and accounts of their experiences were gathered through semi-structured interviews. Through this research, strategies of avatar customisation were explored in order to demonstrate how people use such systems. The shortcomings in game mechanics and user interfaces were highlighted so that future games can improve the avatar customisation experience

Depth and intensity of the sulfate-methane transition zone control sedimentary molybdenum and uranium sequestration in a eutrophic low-salinity setting

Molybdenum (Mo) and uranium (U) contents in sedimentary archives are often used to reconstruct past changes in seafloor oxygenation. However, their sequestration processes are as yet poorly constrained in low-salinity coastal waters, which often suffer from anthropogenic eutrophication but only mild oxygen depletion. Due to the consequent lack of robust long-term paleo-redox reconstructions in such settings often characterized by a shallow front of dissolved sulfide accumulation within the sediment pore waters, inadequate understanding of the long-term drivers behind oxygen loss impedes cost-effective mitigation of this environmental problem. Here, we investigate the mechanisms of Mo and U sequestration in an oxic, low-salinity coastal setting in the northern Baltic Sea where anthropogenic eutrophication over the 20th century has resulted in formation of a shallow sulfate-methane transition zone (SMTZ) in the sediment column of this brackish-water basin. Our results demonstrate remarkably similar patterns for authigenic Mo and U sequestration, whereby the depth and intensity of the SMTZ exerts a first-order control on their solid-phase uptake. Sequential extraction analysis suggests that a large part of the authigenic Mo pool is hosted by refractory Fe-S phases such as pyrite and nanoscale FeMoS4, implying that the Fe-sulfide pathway is the dominating process of authigenic Mo scavenging. However, we also observe a pool of extremely labile Mo deep within the SMTZ, which might record an intermediate phase in authigenic Mo sequestration and/or partial switch to the organic matter (OM) pathway at low dissolved Fe levels. Authigenic U resides in acid-extractable and refractory phases, likely reflecting uptake into poorly crystalline monomeric U(IV) and crystalline uraninite, respectively. Similarly to Mo, authigenic U uptake is active at two fronts within the SMTZ, paralleled by increases in dissolved sulfide levels, suggesting coupling between sulfide production and U reduction. Our results imply that both Mo and U could provide viable proxies for mild bottom water deoxygenation in these settings, through the indirect link between seafloor oxygen conditions and the depth of SMTZ. Of these, Mo appears to more robustly capture variations in seafloor oxygen levels due to the significantly higher share of the authigenic pool. However, temporal resolution of these proxies is limited by the vertical offset between seafloor and the zone of authigenic uptake, and the superimposed character of the signal at a given depth due to vertical migrations of the SMTZ. These results have important implications for the use of Mo and U as paleo-redox proxies in other low-salinity coastal settings exposed to eutrophication.Peer reviewe

Beyond Frozen Conflict Scenarios for the Separatist Disputes of Eastern Europe. CEPS Paperback

This book forms part of a wider project on the relations between the European Union and Georgia, Moldova and Ukraine, and in particular the Association Agreements and Deep and Comprehensive Free Trade Areas (DCFTAs) between these three states and the European Union. The wider project was begun in 2015 in the aftermath of the Maidan uprising at the beginning of 2014, which had been provoked when President Yanukovich reneged over the signing of Ukraine’s Association Agreement with the EU. Following Yanukovich’s flight to Russia, the Association Agreement was duly signed later in 2014. The agreements with Georgia, Moldova and Ukraine have a substantial common content, while differing in various details. Overall, they provide an association model of unprecedented extent and depth. Democratic political values are at the heart of the agreements, while the economic content goes far beyond classic free trade agreements to include a wholesale approximation of EU internal market regulatory law. The purpose of our wider project was first of all to explain the complex content of the Association Agreements and DCFTAs, which was achieved in a series of comprehensive handbooks published at www.3dcftas.eu. However, the agreements contain only short and simple articles on conflict prevention and management, without meaningful operational content. This was notwithstanding the fact that the EU considers itself, for its own historical reasons, to have a special vocation in conflict prevention and resolution. In addition, Georgia and Moldova were already the sites of unresolved separatist conflicts originating around the collapse of the Soviet Union three decades ago, namely Abkhazia and South Ossetia in Georgia, and Transdniestria in Moldova, to which we have added the case of the Nagorny Karabakh between Armenia and Azerbaijan. On top of this legacy, the Maidan uprising led to the Russian annexation of Crimea and its hybrid war in the Donetsk and Luhansk oblasts of the Donbas. The Donbas thus joined the old ‘frozen conflicts’. In the light of the above, CEPS took the initiative to examine all five unresolved conflicts, to assess where these disputes seem to be heading, and what different scenarios could be imagined for their future, including how the European Union might become more engaged. Indeed, while none of the conflicts are resolved, none are for that matter ‘frozen’. Our first practical priority was to find an author to undertake a comprehensive study of the Donbas, since conditions there make it practically impossible for any analysts from the government-controlled part of Ukraine or from Europe to safely enter these territories for research purposes. We were therefore very fortunate to find Nikolaus von Twickel who had recently been travelling in the Donbas as part of the OSCE Mission there, and is now an independent analyst. For the other four ‘old’ conflicts we were also most fortunate to bring in Thomas de Waal, who has been a leading scholar of the region for some decades, and was willing to bring the stories of these conflicts up to date. The two authors were able to address the complete set of conflicts with a consistent analytical approach, as will be evident from reading the sets of scenarios. We express our warm appreciation towards Sweden and the Swedish International Development Agency (Sida) for their support to the entire project. This volume looks at future prospects for the string of unresolved conflicts that continue to plague the post-Soviet world. Four of them date back to the period when the USSR began to break up in the late 1980s. A new conflict, with many different elements and some similarities, was added to the list in 2014: the Donbas in eastern Ukraine. The open confrontation between Russia and Ukraine over the Donbas and Crimea not only destroyed relations between Moscow and Kyiv but changed politics across the region, shaking up the dynamics of the four existing protracted territorial conflicts over Abkhazia, Nagorny Karabakh, South Ossetia and Transdniestria. The five post-Soviet conflicts are often called ‘frozen’, but this is a misnomer. Although the peace processes around them often look frozen, the situations themselves are anything but frozen and are constantly changing. Two of them, over the Donbas and Nagorny Karabakh, are either ongoing or close to violence. Each dispute has its own history, character and context, which has grown more distinctive over time and has been further shaped by the confrontation over Ukraine. Each continues to evolve. Here we chart scenarios for how these conflicts may develop further with the aim of focusing policymakers’ thinking on which tendencies are dangerous and which ones can be encouraged. There are many moving parts to these situations and complacency is not an option

Spatial Dynamics and the Mechanoresponse in CD4+ T Cell Activation

The activation of naïve CD4+ T cells by antigen presenting cells is a critical step in the response of the immune system to foreign pathogens and in its acclimation to host tissues. Activation of naïve T cells proceeds through TCR engagement and is further augmented by CD28 costimulation: ensuring T cell survival and conferring numerous functional capabilities. The work in this dissertation highlights the spatial and temporal dynamics that regulate the initial coupling of CD28 with TCR signaling and also dissects the mechanical properties conferred by downstream effectors that are required to relay CD28 costimulation. A reaction-diffusion model that describes the spatial regulation of costimulation in activating human T cells is developed. The Src kinase Lck, though predominantly cytosolic, is an ideal candidate for the coupling of the TCR and CD28 pathways. Membrane associations bring Lck in contact with these receptors, where mediation of its active state by kinase activity and regulation of its spatial dynamics dictate its capacity to integrate early TCR and CD28 signaling. This developed reaction-diffusion model focusing on Lck is then extrapolated to mouse cells that do not share similar sensitivity to segregation of TCR and CD28 triggering: indicating that while Lck is essential for costimulation, it does not confer spatial sensitivity in activating mouse T cells. A comparison of human and mouse cells demonstrate underlying differences in the diffusivity of Lck across the membrane and the enrichment of the cytoskeleton at the interface. The role of the cytoskeleton in generating TCR-driven contractile forces is then investigated through use of micropillar arrays. This approach also enables the quantification of forces generated by T cells during cellular activation. The impact of CD28 costimulation on TCR-driven force generation is assessed and noted to increase cellular forces by 80% beyond what is induced through TCR triggering. By manipulating the presentation of CD28 activation, CD28 is determined to be a mechanoresponsive receptor that is not directly responsible for mechanosensitivty. Rather, CD28 mediates a change in cellular forces through PI3 kinase, whose inhibition normalizes force generation in T cells activated by TCR and those costimulated with TCR and CD28. Downstream of PI3 kinase, PDK1 is identified as being essential in both TCR and CD28 costimulatory force generation; inhibition of PDK1 fully abrogates cellular forces. Lastly, we qualitatively characterize T cell activation on micropillar arrays, where their complex topology reveals a multiphasic behavior during activation. Whereas T cells activated on planar surfaces are relatively stationary, T cells activated on micropillars slowly migrate towards the base of the array. Forces exerted during this migration are substantially greater than those previously measured, and the slow migration leads to the characterization of multiple phases and the relocalization of key cellular proteins

Doctor of Philosophy

dissertationThis dissertation utilizes law and society research, as well as communication advocacy, to frame analysis and offer an extra-legal solution to conflicts between modders, fans who create new content from existing videogames, and game companies. It utilizes grounded theory and the traditional legal adversarial documentary method to abstract and analyze conflict caused by a cease and desist (C&D) letter sent to Kajar Laboratories concerning Chrono Trigger: Crimson Echoes - Kajar's mod to Square Enix's Chrono Trigger. Through qualitative analysis of websites, forum posts, and blog comments about the C&D this dissertation discovers the grounded theory Legal Threats Break Moral Communities. Utilizing the grounded theory and legal argumentation a critique is made of proposed legal solutions. A nonlegal solution to ameliorate future conflict is then suggested as a means to satisfy both the needs of modders and game companies. In analyzing the conflict this dissertation illustrates how the threat of law stops modders, disrupts the community, and chills future mods. This dissertation reinforces a regulatory understanding of copyright law arguing limited monopolies on intellectual property serve to advance the arts and sciences. Modding, like many forms of participatory culture, promotes valuable science, technology, engineering, and math through self-learning. Mods promote the original games while also generating new art. The dissertation also shows that both regulatory and proprietary interpretations of copyright law benefit from modding. Through critique of status quo solutions and analysis of a Microsoft exemplar this dissertation suggests a generic game content usage guide as an extra-legal, feasible solution that advances the goals of all parties involved without requiring legal intervention

Foreign Intervention in Africa after the Cold War: Sovereignty, Responsibility, and the War on Terror

In Foreign Intervention in Africa after the Cold War—interdisciplinary in approach and intended for nonspecialists—Elizabeth Schmidt provides a new framework for thinking about foreign political and military intervention in Africa, its purposes, and its consequences. She focuses on the quarter century following the Cold War (1991–2017), when neighboring states and subregional, regional, and global organizations and networks joined extracontinental powers in support of diverse forces in the war-making and peace-building processes. During this period, two rationales were used to justify intervention: a response to instability, with the corollary of responsibility to protect, and the war on terror. Often overlooked in discussions of poverty and violence in Africa is the fact that many of the challenges facing the continent today are rooted in colonial political and economic practices, in Cold War alliances, and in attempts by outsiders to influence African political and economic systems during the decolonization and postindependence periods. Although conflicts in Africa emerged from local issues, external political and military interventions altered their dynamics and rendered them more lethal. Foreign Intervention in Africa after the Cold War counters oversimplification and distortions and offers a new continentwide perspective, illuminated by trenchant case studies.https://ohioopen.library.ohio.edu/oupress/1020/thumbnail.jp

MOBILITY OF PLUTONIUM IN ZEA MAYS (CORN): DETERMINATION OF TRANSPORT VELOCITIES, SPATIAL DISTRIBUTION AND CORRELATIONS WITH IRON.

Understanding the environmental behavior of plutonium (Pu) is essential for proper radioactive waste disposal or for remedial activities following an accidental release of Pu. The environmental behavior of Pu is influenced by physical, chemical, and biotic factors, such as the simultaneous existence of multiple Pu species, redox transformations at mineral surfaces, colloid formation, and the potential of microbes and plants to affect its sorption to soil. Plant Pu studies have been conducted for quantifying bioaccumulation or phytoremediation. Until now, experimental studies have not focused on the capacity of plants to affect the transport behavior and distribution of Pu in the subsurface. This dissertation addressed the hypothesis that root uptake and transport in plants can influence the mobility of Pu in the vadose zone. The overarching goal was to provide experimental support for reactive transport modeling of root uptake and xylem transport and for a connection between Pu uptake and the plant\u27s nutritional requirement for Fe. The objectives were to: (1) quantify complexed Pu retardation in graminaceous plants and to quantify complexed Pu sorption to plant xylem, (2) characterize the distribution and accumulation of complexed Pu in plants, and (3) compare correlations between plant uptake of complexed Pu and Fe. In addition, a couple of simple models for predicting Pu transport by roots were examined. Bench scale experiments were conducted using corn (Zea mays) as a representative of the grass family. Corn was grown in 1L soil pots above 500 mL nutrient solution containers with the primary root inserted in solution. Growth conditions were 14/10 h day/night cycles (32/20 °C), 30-50% RH, and a photosynthetic flux of 1300-1500 micromol/ m2s. To commence exposure, an aliquot of Pu(DFOB) or Pu2DPTA3 or both Pu and 59Fe complexed with DFOB was added to the nutrient solution. Plants were 23 - 28 d old when sacrificed. Plutonium and 59Fe contents were determined by liquid scintillation analysis and stable element contents were determined by ICP-MS. Sorption tests were conducted with Pu as Pu(IV), Pu(DFOB), or Pu2(DTPA)3 and cellulose or xylem excised from cotton stem tissue. The Pu plant transport velocities were 174 - 348 cm/h and water velocities were 300 - 800 cm/h. Thus the retardation factor of Pu in live plants was measured to be 1-5 and estimated to be 1-10 due to water velocity uncertainty. With respect to the second objective, analysis of the spatial distribution of Pu in corn indicated that discrimination occurs at the exodermis and in root tissues, most of the Pu in the plant was retained in the roots, and the fraction of Pu that entered the xylem was rapidly transported upward to the rest of the plant. An overall average of greater than 97% of the Pu was found in the roots with the remainder in the shoots. The maximum shoot activity fraction was four per cent for plants exposed for 10 d however steady state translocation was not attained. Profiles of Pu concentration versus shoot length showed that Pu concentrated in the upper shoots. With respect to the third objective, several findings are of interest. The plant uptake of Pu remained unchanged for Fe: Pu ratios ranging from 0 - 2.2 x 105. Large changes in Fe concentrations did not inhibit or enhance plant uptake of Pu. Comparisons of the distribution profiles of Pu, 59Fe, stable Fe, and several other nutrient elements showed that Pu was distributed very much like 59Fe in the shoot. However six times as much Pu was found in the root than 59Fe, and 40% more 59Fe was found in the shoot than Pu. The shoot distribution data strongly suggest that upon entering the xylem, Pu and Fe are physiologically treated in a highly similar manner. Clearly, Pu is simultaneously taken up with Fe. Using an instantaneous partitioning model, comparisons were remarkably consistent between the soil concentration data of the SRS lysimeters and predictions using concentration ratios derived from field studies involving different plants, soils, and experimental conditions. The steady-state advection model predicted Kd values for Pu and plant root zone soil that are much lower than batch sorption determinations. This is consistent with enhanced mobility of sorbed Pu by siderophores or other plant exudates